Since aluminum exterior signage has an automotive finish always use clean water and car shampoo 3 – 4 times per year or as needed. Car shampoo contains a wax to protect and preserve the painted surface.
Pro Tip 👉🏻 Make sure exterior signs are not exposed to constant irrigation or water lines, this will dramatically degrade the life of your sign.
Pro Tip 👉🏻 Never use paper towels on acrylic, this will scratch the surface.
Industrial Areas can see more corrosive particles like lime, oil based deposits, sulphur dioxide, acids and other airborne pollutants and should be cleaned more regularly.
Tree, bush, and bird deposits (all rich in alkali) should be removed promptly and may require more regularly.
Coastal Areas have higher concentrations of salt and humidity which could adversely affect painted finishes, so clean more often to help extend the life
All painted and plastic components do fade over time. But using smart color selection, avoiding direct sunlight, and regular cleaning high quality signage can look great for years!